diff options
Diffstat (limited to 'keystone-moon/keystone/common/manager.py')
| -rw-r--r-- | keystone-moon/keystone/common/manager.py | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/keystone-moon/keystone/common/manager.py b/keystone-moon/keystone/common/manager.py index 28bf2efb..7150fbf3 100644 --- a/keystone-moon/keystone/common/manager.py +++ b/keystone-moon/keystone/common/manager.py @@ -14,7 +14,13 @@ import functools +from oslo_log import log +from oslo_log import versionutils from oslo_utils import importutils +import stevedore + + +LOG = log.getLogger(__name__) def response_truncated(f): @@ -53,6 +59,28 @@ def response_truncated(f): return wrapper +def load_driver(namespace, driver_name, *args): + try: + driver_manager = stevedore.DriverManager(namespace, + driver_name, + invoke_on_load=True, + invoke_args=args) + return driver_manager.driver + except RuntimeError as e: + LOG.debug('Failed to load %r using stevedore: %s', driver_name, e) + # Ignore failure and continue on. + + @versionutils.deprecated(as_of=versionutils.deprecated.LIBERTY, + in_favor_of='entrypoints', + what='direct import of driver') + def _load_using_import(driver_name, *args): + return importutils.import_object(driver_name, *args) + + # For backwards-compatibility, an unregistered class reference can + # still be used. + return _load_using_import(driver_name, *args) + + class Manager(object): """Base class for intermediary request layer. @@ -66,8 +94,10 @@ class Manager(object): """ + driver_namespace = None + def __init__(self, driver_name): - self.driver = importutils.import_object(driver_name) + self.driver = load_driver(self.driver_namespace, driver_name) def __getattr__(self, name): """Forward calls to the underlying driver.""" |